how do you connect ipad to itunes on another computer using network sharing?
The Itunes side has sharing turned on, but i cannot see an option for ipad to use an external source?
Are you talking about home sharing?
iTunes home sharing
Home sharing support
http://www.apple.com/support/homesharing/
Understanding Home Sharing
http://support.apple.com/kb/HT3819
Troubleshooting home sharing
http://support.apple.com/kb/TS2972
About iTunes file sharing